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The TCP/IP Guide  9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)       9  TCP/IP Key Applications and Application Protocols            9  TCP/IP Application Layer Addressing: Uniform Resource Identifiers, Locators and Names (URIs, URLs and URNs)                 9  Uniform Resource Locators (URLs)

URL Schemes (Applications / Access Methods) and Scheme-Specific Syntaxes 1 2 3 4 URL Length and Complexity Issues

Improving Document Portability Using Relative URLs

There is one other very important benefit of using relative URLs: avoiding absolute URLs in a document allows it to be more portable by eliminating “hard-coded” references to names that might change. Going back to our previous example, if the guy maintaining the site “http://www.longdomainnamesareirritating.com/” uses only relative links to refer to graphics and other embedded objects, then if the site is migrated to “www.muchshortername.com”, he will not have to edit all of his links to the new name. The significance of this in Web URLs is explored further in the detailed topic on HTTP URLs.

URL Schemes (Applications / Access Methods) and Scheme-Specific Syntaxes 1 2 3 4 URL Length and Complexity Issues